Rod Stewart, 79, is joined by his son Aiden, 13, while cheering on his beloved Celtic during their 3-0 victory against St Mirren

Jools was diagnosed with prostate cancer in 2014 following a routine blood test after having no symptoms.

Jools added: ‘The whole point is to raise awareness so if you’re a man out there, get yourself checked.’

It comes after Sir Rod sold the rights to his music and likeness to Irving Azoff’s Iconic Artists Group for just under $100 million.

The rock legend – whose back catalogue includes the hits Maggie May, Stay With Me, You Wear It Well, You’re in My Heart, and Do Ya Think I’m Sexy? – feels that after six decades in the music business, it’s time to secure his legacy.